.a {
  bottom: 1px;
  background-color: white;
}
.block:nth-of-type(1) {
  background-color: white;
}
.block:nth-of-type(1) {
  background-color: #2ec7c9;
}
.block:nth-of-type(2) {
  background-color: #66aa66;
}
.block:nth-of-type(3) {
  background-color: #44ee55;
}
.block:nth-of-type(4) {
  background-color: #33aa22;
}
.block:nth-of-type(5) {
  background-color: #99ff f;
}
